diff options
Diffstat (limited to 'drivers/char/misc.c')
| -rw-r--r-- | drivers/char/misc.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/char/misc.c b/drivers/char/misc.c index eaace0d..6e1563c 100644 --- a/drivers/char/misc.c +++ b/drivers/char/misc.c @@ -49,6 +49,7 @@ #include <linux/device.h> #include <linux/tty.h> #include <linux/kmod.h> +#include <linux/smp_lock.h> /* * Head entry for the doubly linked miscdevice list @@ -118,6 +119,7 @@ static int misc_open(struct inode * inode, struct file * file) int err = -ENODEV; const struct file_operations *old_fops, *new_fops = NULL; + lock_kernel(); mutex_lock(&misc_mtx); list_for_each_entry(c, &misc_list, list) { @@ -155,6 +157,7 @@ static int misc_open(struct inode * inode, struct file * file) fops_put(old_fops); fail: mutex_unlock(&misc_mtx); + unlock_kernel(); return err; } |
